[McAdoo Tunnel.]

[McAdoo Tunnel.]

[McAdoo Tunnel.]

[Constructing the McAdoo Tunnel.]

[McAdoo Tunnel.]

[McAdoo Tunnel.]

Building the McAdoo Tunnel, Under the Hudson River, New York.

[William McAdoo.]

McAdoo Tunnel under North River, New York

[Tunnel construction.]

[Cheering parade of delegates after nominating McAdoo for president.]

[North tunnel shield.]

[Holland Tunnel.]

[Holland Tunnel.]

Midtown Tunnel under Hudson River, April 24, 1935

[Tunnel construction.]

Original Exhibits of Rapid Transit Subway Construction Company, Plaintiff [Excavating a tunnel; subway construction.]

[Holland Tunnel.]

Southbound express tunnel.

Queensboro Tunnel.